FILE - In this March 12, 2008 file photo, actress and comedienne Carol Burnett performs her famous Tarzan yell during her appearance on the NBC "Today" television program in New York. Burnett, who honed her humor on Broadway and landed her own comedy show on television in 1967, will win the nation’s top humor prize. The Kennedy Center for the Performing Arts announced Tuesday that Burnett will receive the Mark Twain Prize for American Humor on Oct. 20 in Washington. A gala performance featuring top names in comedy will be taped and broadcast nationally Oct. 30 on PBS. (AP Photo/Richard Drew, File)